Cammed LS7 results
12-29-2005, 08:28 PM
#6
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Still great numbers for the 427.
Torque holds well in the upper range. That's a nice 2500 RPM band of power.
Shift that baby just a touch over 7000 and watch the 11's ease by.
Torque holds well in the upper range. That's a nice 2500 RPM band of power.
Shift that baby just a touch over 7000 and watch the 11's ease by.
12-29-2005, 08:31 PM
#7
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Originally Posted by gollum
Look at Stage 3's exhaust duration. 335 advertised, 276 @.050
Can anyone figure what Stage 3's Lobe Seperation Angle and Installed Lobe Centerline is?
Can anyone figure what Stage 3's Lobe Seperation Angle and Installed Lobe Centerline is?
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12-29-2005, 10:27 PM
#8
Why did they use such a rediculous split on the Stage 3, and why did they choke it with a 1 3/4 header with a 2.5" collector 
?
Put a 238°/248° .610"/.620" 112° LSA + 2° (110° IC) cam in there and a 1 7/8 header with a 3.5" collector!
?Put a 238°/248° .610"/.620" 112° LSA + 2° (110° IC) cam in there and a 1 7/8 header with a 3.5" collector!
I noticed that earlier. 
12-30-2005, 09:56 AM
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540rwhp == 613HP engine, LGM is already getting this with a "small" camshaft. The TQ curve looks like an overlay of the stock cam, so I imagine the LGM cam was not that much bigger in duration but a more agressive lobe.
233/276@.05" sounds pretty bogus to me.
233/276@.05" sounds pretty bogus to me.
12-30-2005, 10:59 PM
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My guess is the split is not bogus. Look at the stock LS7 cam, 19* of split. The LS7 heads dont have good exhaust ports. I wonder what this would idle like...these hotcams are all like 108* lsa or so...yikes!
12-31-2005, 10:11 AM
#17
The valve events are wrong on the HR pic.
Example - Stage III @ .050 the Intake opening should be BTDC - Not ATDC. Exhaust closing should be ATDC - Not BTDC.
Also, I believe GM likes asymmetrical lobes so it's hard to pinpoint centerlines.
FWIW.
Example - Stage III @ .050 the Intake opening should be BTDC - Not ATDC. Exhaust closing should be ATDC - Not BTDC.
Also, I believe GM likes asymmetrical lobes so it's hard to pinpoint centerlines.
FWIW.
